STMPE2401 datasheet(43/55 Pages) STMICROELECTRONICS

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STMPE2401

Keypad controller

43/55

13.4

KPC_row_lsb register

13.5

KPC_ctrl_msb register

Table 40. KPC_row_lsb register

Bit

210

Name

output Row 0 ~ 7

Read/Write

WWWW

Reset Value

000

Bit

Name

Description

output Row 7

‘1’ to turn on scanning of row 7; ‘0’ to turn off

output Row 6

‘1’ to turn on scanning of row 6; ‘0’ to turn off

output Row 5

‘1’ to turn on scanning of row 5; ‘0’ to turn off

output Row 4

‘1’ to turn on scanning of row 4; ‘0’ to turn off

output Row 3

‘1’ to turn on scanning of row 3; ‘0’ to turn off

output Row 2

‘1’ to turn on scanning of row 2; ‘0’ to turn off

output Row 1

‘1’ to turn on scanning of row 1; ‘0’ to turn off

output Row 0

‘1’ to turn on scanning of row 0; ‘0’ to turn off

Table 41. KPC_ctrl_msb register

Bit

210

Name

ScanCount0 ~ 3

DKey_0 ~ 3

Read/Write

WWW

Reset Value

000

Bit

Name

Description

ScanCount3

Number of key scanning cycles elapsed before a confirmed

key data is updated into output data FIFO (0 ~ 15 cycles)

ScanCount2

ScanCount1

ScanCount0

DKey_3

Set ‘1’ to use Input Column 3 as dedicated key

DKey_2

Set ‘1’ to use Input Column 2 as dedicated key

DKey_1

Set ‘1’ to use Input Column 1 as dedicated key

DKey_0

Set ‘1’ to use Input Column 0 as dedicated key

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